This book discusses the fundamental and advance concepts of optimization and operations research. It gives an overview of the historical perspective of operations research and explains its fundamental characteristics, tools, and applications. The wide range of topics covered by the book includes convex and concave functions, simplex methods, post optimality analysis of linear programming problems, constrained and unconstrained optimization, theory of game, queueing theory, and related topics. The book also elaborates on project management, including the importance of critical path analysis, PERT and CPM techniques. An ideal textbook for any discipline with one or more courses in optimization and operations research, this book can also be referred by research scholars in areas of operations research.